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// Copyright 2018 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ABSL_CONTAINER_INTERNAL_TRACKED_H_
#define ABSL_CONTAINER_INTERNAL_TRACKED_H_
#include <stddef.h>
#include <memory>
#include <utility>
namespace absl {
inline namespace lts_2018_12_18 {
namespace container_internal {
// A class that tracks its copies and moves so that it can be queried in tests.
template <class T>
class Tracked {
public:
Tracked() {}
// NOLINTNEXTLINE(runtime/explicit)
Tracked(const T& val) : val_(val) {}
Tracked(const Tracked& that)
: val_(that.val_),
num_moves_(that.num_moves_),
num_copies_(that.num_copies_) {
++(*num_copies_);
}
Tracked(Tracked&& that)
: val_(std::move(that.val_)),
num_moves_(std::move(that.num_moves_)),
num_copies_(std::move(that.num_copies_)) {
++(*num_moves_);
}
Tracked& operator=(const Tracked& that) {
val_ = that.val_;
num_moves_ = that.num_moves_;
num_copies_ = that.num_copies_;
++(*num_copies_);
}
Tracked& operator=(Tracked&& that) {
val_ = std::move(that.val_);
num_moves_ = std::move(that.num_moves_);
num_copies_ = std::move(that.num_copies_);
++(*num_moves_);
}
const T& val() const { return val_; }
friend bool operator==(const Tracked& a, const Tracked& b) {
return a.val_ == b.val_;
}
friend bool operator!=(const Tracked& a, const Tracked& b) {
return !(a == b);
}
size_t num_copies() { return *num_copies_; }
size_t num_moves() { return *num_moves_; }
private:
T val_;
std::shared_ptr<size_t> num_moves_ = std::make_shared<size_t>(0);
std::shared_ptr<size_t> num_copies_ = std::make_shared<size_t>(0);
};
} // namespace container_internal
} // inline namespace lts_2018_12_18
} // namespace absl
#endif // ABSL_CONTAINER_INTERNAL_TRACKED_H_
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